tests: fix build with awk that does not support switch-case
tests: fix build with awk that does not support switch-case

The switch-case statement is a gawk-specific feature which is not
necessarily available, let's use traditional if-else statements instead.

* tests/uid.awk: Rewrite without switch-case statements.

cuviper/strace,TeamExodus/external_strace,bigzz/strace_android,Saruta/strace,bnoordhuis/strace,cuviper/strace,geekboxzone/mmallow_external_strace,kapdop/android_external_strace,Yu-AndroidM/android_external_strace,kapdop/android_external_strace,Infinitive-OS/platform_external_strace,Yu-AndroidM/android_external_strace,bigzz/strace_android,Distrotech/strace,Saruta/strace,MonkeyZZZZ/platform_external_strace,YUPlayGodDev/platform_external_strace,YUPlayGodDev/platform_external_strace,Distrotech/strace,kapdop/android_external_strace,bnoordhuis/strace,vrastogi/strace,vrastogi/strace,geofft/strace,MonkeyZZZZ/platform_external_strace,vrastogi/strace,geofft/strace,geofft/strace,AOSP-YU/platform_external_strace,Yu-AndroidM/android_external_strace,bigzz/strace_android,Infinitive-OS/platform_external_strace,geofft/strace,Saruta/strace,vrastogi/strace,vrastogi/strace,Distrotech/strace,bnoordhuis/strace,TeamExodus/external_strace,AOSP-YU/platform_external_strace,Infinitive-OS/platform_external_strace,AOSP-YU/platform_external_strace,MonkeyZZZZ/platform_external_strace,geofft/strace,Yu-AndroidM/android_external_strace,YUPlayGodDev/platform_external_strace,cuviper/strace,Saruta/strace,YUPlayGodDev/platform_external_strace,geekboxzone/mmallow_external_strace,MonkeyZZZZ/platform_external_strace,MonkeyZZZZ/platform_external_strace,geekboxzone/mmallow_external_strace,AOSP-YU/platform_external_strace,TeamExodus/external_strace,bigzz/strace_android,cuviper/strace,Distrotech/strace,YUPlayGodDev/platform_external_strace,Distrotech/strace,geekboxzone/mmallow_external_strace,kapdop/android_external_strace,Infinitive-OS/platform_external_strace,Infinitive-OS/platform_external_strace,Yu-AndroidM/android_external_strace,kapdop/android_external_strace,AOSP-YU/platform_external_strace,TeamExodus/external_strace,TeamExodus/external_strace,Saruta/strace,bnoordhuis/strace,cuviper/strace,geekboxzone/mmallow_external_strace,bigzz/strace_android